PUPAL STAGES OF WEST AFRICAN CULICID^. 31$ 



marked valves at the end, and 4-5 pairs of stiff triple long liairs (sub- 

 plumose) on the same line as the spines, which are obvious, and run about 

 half-way up ; there is a pair of compound hairs on the dorsal side, and lateral 

 hairs (all subplumose) as well (PI. I, fig. 10). 



The anal segment is about as broad as it is long, and has four stout papillae 

 Avith blunt ends, which are nearly equal in length. On the dorsal edge are 

 two long, and a number of shorter, strong hairs. The ventral beard is only 

 moderate in size, at its longest not equalling the papillae. All the hairs on 

 the anal segment are simple. 



Larva 5 mm. in length. 



Pupa. 



The trumpets are short, the hairs at the base of the thorax are paired 

 plumes (PI. I, fig. 11), and the stellate hairs on the segments of the abdomen 

 are well marked. Two long double hairs which spring from near the eyes 

 are rather conspicuous, and the small plumes on the last two segments are of 

 plumose hairs (PL I, fig. 12). 



Length of thorax 1| mm. 



Described from six larvse and eight pup?e. 



[A raft of about 140 eggs was laid upon some water in a glass jar in the 

 veranda of the bungalow at the end of May. Eggs hatched in two days ; 

 larva? became pupae in eight days ; pupal stage lasted three days. — W. M. Gr.] 



12. Culiciomyia cinerea, Theo. ,, . 



Larva. 



Large stout larvae, with the head considerably narrower than the thorax^ 

 and rather dark in colour (deep reddish brown— almost Vandyke). Antennae 

 with a plume of simple, or sub-simple hairs; distal joint fairly st6ut, more so 

 than usual ; very short hairs on the end (PL Y, fig. 5) . Brush and mouth- 

 parts hairy ; the plumes on the face all developed, moderate in size but of 

 quite plumose hairs. Eyes large, with the pigment spot not at all con- 

 spicuous. 



Thorax with the usual normal plumes of plumose hairs. ; i ; 



The abdomen has on the third to the sixth segments symmetrical quadriiple 

 ihairs of moderate length, which are subplulnose, and on the ventral side 

 symmetrical long triple hairs, which, are also subplumose, but difficult to see. 

 The abdomen in all the specimens is quite dark, which renders it difficult to 

 make out the comb without much manipulatiori ; when clearly seen, it shows 

 as a row of small scales close to each other, followed by a second row of 

 longer, more separated scales, and a third row of about ^ve scales. Siphonal 

 and sub-siphonal plumes particularly large, the latter reaching to the end of 

 the anal segment. : :';, , ; ; -'V 



BULL. ENT. RES. VOL. I. PART I. APRIL I9IO. D 



